1. Synchrotron studies of novel Tb2Ni5C3: Crystal and electronic structure
- Author
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Iurii Dovgaliuk, B. Kotur, Volodymyr Levytskyy, Volodymyr Babizhetskyy, Mykola Hembara, and Volodymyr Pavlyuk
- Subjects
Materials science ,Annealing (metallurgy) ,Mechanical Engineering ,Metals and Alloys ,02 engineering and technology ,Electronic structure ,Structure type ,Crystal structure ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Ternary phase ,01 natural sciences ,Synchrotron ,0104 chemical sciences ,law.invention ,Crystallography ,Mechanics of Materials ,law ,Materials Chemistry ,0210 nano-technology ,Powder diffraction ,Metallic bonding - Abstract
New ternary phase Tb2Ni5C3 was gained in the three-phases sample of nominal composition after 90 d annealing at 800 °C. Crystal structure of Tb2Ni5C3 was determined using synchrotron powder diffraction: structure type La2Ni5C3, space group P4/mbm, a = 8.2372(1) A, c = 3.83402(6) A, RB = 5.0%; Rp = 1.8%. Crystallographic analysis and electronic structure calculations confirm the La2Ni5C3-isotypes including Tb2Ni5C3 refer to carbometalates. Metallic bonding is predominant in the R2Ni5C3 compounds. Novel La2Ni5C3-isotypic compounds were synthesized with rare earths Sm and Gd. Their unit cell parameters have been determined from X-ray powder diffraction data.
- Published
- 2019
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